Portable building material oven



3ice

Oct 22, 1940 c. N. sPsDELl. ET AL 2,218,589

PORTABLE BUILDING MATERIAL OVEN Filed April 25, 1558 y HWF/J5 Afp/5017 indy!! l f-ymsAj/fig 5 Patented Oct. 22, 1940 PATENT OFFICE 2,218,589 PORTABLE BUILDING MATERIAL OVEN Charles Nelson Spidell and James A. Skaggs,

Milwaukee, Wis.

Application April 25, 1938, Serial No. 204,068

2 Claims.

This invention relates to heating devices for use in the building trades to heat or warm bricks and other similar building material'.

It is well known that in cold weather, bricks,

5 stones and building blocks should be heated or at least warmed before use to preclude freezing of the mortar. Heretofore,` this wasdone in a more or lesshaphazard manner, and as a consequence, the results have been far from satisfactory.

Ordinarily, the bricks or other building material were merely piled around an open iire or around a salamander. The bricks were thus baked on one side and frosted on the other side, an obviously undesirable condition. Uniform .5 temperature distribution throughout the entire structure of the brick or block could never be attained. l

It is, therefore, an' object of this invention to provide a heating or warming device suitable for heating bricks and building blocks and so constructed as to insure uniform ltemperature distribution throughout the entire area of the brick or block.

It is also an objectof this invention to provide a device of the character described which is so designed that the desiredheating of the bricks or other building material is accomplished with due dispatch and with a minimum of manual attention and handling. w

It is also an object of this invention to provide a heating device of the character described which is readily portable so that it may be easily transported to the building site and setk up for use wherever expedient. .v

A further object of this invention is to provide a heating device for the purpose described which is rugged in construction so as to be capable of withstanding the rough handling to which equipment lof this character is ordinarily subjected.

With the above and otherobjects in View which will appear as the description proceeds, -this invention resides in the novel construction, combination and arrangement 'of parts substantially as hereinafter described, and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

The accompanying drawing illustrates one complete example of the physical embodiment of the invention constructed in accordance with the best mode so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a side view of a heating device constructed in accordance with this invention, part thereof being broken away and in section;

Figure 2 is a sectional view taken through Figure 1 on the plane of the line 2--2; and l Figure 3 is a cross sectional'view taken on the plane of the line 3 3 in Figure 1.

Referringnow particularly to the accompanying drawing in which like numerals indicate like parts, the numeral I represents a perimetrally closedelongated chamber constructed of sheet metal and preferably having a rectangular cross section. The chamber may be built up of complementary `upper and lower sections 2 and 3 having their side walls 4 suitably joined. For this purpose, it is desirable to provide flanges 5, which are either riveted or welded together, with a horizontal partition wall 6 therebetween. The partition' wall 6 extends throughout the entire length of the chamber to divide the same into an upper oven compartment and a lower heating compartment. At its rear end, the partition wall is curved downwardly intothe lower compartment to provide a deflector wall'l.. u v

The ends of the chamber are 'closed by end walls and 9 except'for openings vI0 and Il in the upper portions of the end walls, which openings provide an inlet and` an outlet for the oven compartment to enable the entry andremoval' transversely across thechamber and have trunnions I4 journalled in holes formed in the side walls of the upper section Zlof the chamber; In assembling, the rollers I 3 maybe mounted in position before the upper and lower sections are joined, at which time the side walls of the upper v section may be sprung apart sufficiently to permit the introduction of the trunnions I4 into their supporting holes. l

To facilitate placing the bricks or other vbuilding blocks on and taking them off the conveyor track, loading and unloading platforms I5 and I6, respectively, are provided. These platforms are conveniently formed by extending the conveyor track beyond the end wall 8 and the upper 'portion of the end wall 9.

Heat is supplied by means of a kerosene burner, or other suitable heating device (not shown) havveyor track.

ing a nozzle l1 which projects a heating flame through a hole I 8 in the lower portion of the end wall il. The heating medium thus introduced is constrained to traverse the length of the chamber by a baille wall I9, the side edges of which are xed to the side walls of the lower section 3. Passing around the far end of the baiiie wall I9, which is spaced from the deflector wall 1, the heating medium and products of combustion move forwardly directly in contact with the partition wall 6 which forms the bottom of the oven compartment, to pass out through an exhaust flue 20 after being spent.

The upper oven compartment in which the bricks and other building material is disposed in its passage through the chamber, is thus uniformly heated and although the heated air is free to circulate around the bricks or other building l that discoloration is not objectionable, it may be desirable to allow the heating medium and products of combustion to enter the oven compartment. For this purpose, the partition wall B has a hole in its middle portion, which is closed by a 1 removable slide 2i.

To conserve heat, it is preferable to provide a dead air space around both the upper and the lower compartments. These air spaces are formed by jackets 22 conveniently secured in place by having attaching flanges 23 overlying and secured to the joined flanges 5.

Loss of heat is also guarded against by the provision of flaps or doors 24 at the inlet and outlet openings, formed of canvas or other fabric to provide the desired closure Without precluding free passage of bricks.

At each end, the structure is equipped with handles 26 by which it may be carried about, and to provide further portability, it is mounted on Y a pair of Wheels 2'I.. The wheels are preferably located at .one end, the opposite end being suppo-rted by a leg 28 hinged as at 29 to the bottomof the structure and provided with a folding brace 30 by which the leg is held in a vertical operative position.

Preferably, the leg 28 is adjustable so that the structure may be set in a horizontal position, as shown, or at an inclination to facilitate the passage of bricks or other material along the con- In the construction illustrated, such adjustment is eifected by forming the leg 28 of two telescoping parts 3l and 32 held in fixed relationship by a removable pin 33.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art that this invention provides a convenient and practical device for heating or warming bricks and other similar building material preparatory to use in cold weather.

What we claim as our invention is:

1. A portable heating device for bricks and other building material comprising: an elongated perimetrally closed chamber having inlet and outlet openings in the upper'portions of its opposite ends and having an imperforate bottom wall; means for supporting the chamber in any desired location and at an inclination with its inlet higher than its outlet; a plurality of side by side transversely extending rollers having their opposite ends rotatably supported by the side Walls of the chamber in a plane substantially in line with the bottom of the inlet and outlet openings so that the rollers collectively form a conveyor track leading from the inlet to the outlet; a partition wall beneath the rollers to divide the interior of the chamber into upper and lower compartments; said conveyor track being adapted to movably support bricks and other building material for gravityv propelled passage longitudinally through the upper compartment; means for introducing a heating medium endwise into one end of the lower compartment; an exhaust iiue at said end of the lower compartment; and means in the lower compartment to cause the heated gases to substantially traverse the length of the chamber twice before reaching the exhaust ue.

2. A portable heating device for bricks and other building material comprising: a perimetrally closed chamber of substantially uniform cross sectional area having inlet and outlet openings and an imperforate bottom wall; a pair of wheels supporting one end of the chamber whereby the device is readily manually portable; an adjustable support for the opposite end of the chambensaid support and the wheels enabling the heating device to be manually set up for use in any suitable location and with the chamber inclined so that its inlet is higher than its outlet; a plurality of side by side transversely Vextending rollers having their opposite ends rotatably supported bythe side walls of the chamber and collectively forming a conveyor track extending longitudinally through the chamber on a plane substantially in line with the bottom of the inlet and outlet openings for freely movably supporting bricks and other building material for: gravity propelled passage longitudinally through the chamber; means for introducing a heating medium endwise into one end of the chamber and under the conveyor track; and means underlying the conveyor track for preventing the heating medium from directly contacting the bricks and other building material on the conveyor track and for `effecting uniform heat distribution throughout the entire length of the chamber.

' CHARLES NELSON SPIDELL.

JAMES A. SKAGGS. 

